Shufeldt : Osteology of the Psn taci. 421 



(|iiestion that this interesting form, simply rcjjrcscnts a fomily, and 

 probably a very old family of the i)sittacine group of birds. 



I'AI'l ANAJION OF Pl.ATFS. 



[The figures in Plates XXI-XXIII are all from photographs made by the author 

 direct from the specimens, those of Conurus being in his own collection, and the others 

 from specimens belonging to the United States National Museum. The skeleton of 

 the Owl Parrot {Strii^ops hubroptilus Gray) was photograi>hed by Professor T. W. 

 Smillie of the U. S. National Museum, and is specimen No. 18,276 of the osteological 

 collections of that institution, it having been obtained at Dusky Sound, N. Zealand, 

 a number of years ago. ] 



Pl.^te XXL 



Hg. I. Right lateral view of the skull and mandible (the latter detached) of 

 Conurus carolinensis . Adult 9 > natural size. 



Fig. 2. Right lateral view of the trunk skeleton and attached shoulder girdle of 

 Conufus carolinensis, adult 9> natural size. From the same individual, the skull of 

 which is shown in Fig. i. 



Fig. 3. Left lateral view of the skull and mandible of a Macaw yAra inili/arius). 

 Specimen collected by F. Bischott at Mazatlan, Mexico. 



Pl..\TE XX 11. 



Fig. 4. Right lateral view of the skull and mandible (the latter detached) of 

 Cicatua galerita, adult, nat. size. (Spec. No. 18,744.) 



Hg. 5. Ventral aspect of the sternum and shoulder girdle of Calyptorhynchus 

 banksi, adult 9. (From N. S. Wales, Clarence River.) 



Fig. 6. Anconal aspect of left humerus of Cacatua galerita. From the same indi- 

 vidual which furnished the skull shown in Fig. 4, natural size. 



Fig. 7. Palmar aspect of right humerus of Cacatua galerita from same specimen as 

 Figs. 4 and 6. Nat. size. 



Plate XXIIL 

 Fig. 8. Right lateral view of the trunk, skeleton, shoulder girdle, and last five (5) 

 cervical vertebra of Cacatua galerita, natural size, and from the skeleton of the same 

 specimen which furnished the skull and humeri shown in Plate II, Figs. 4, 6, and 7. 



Plate XXIV. 

 Fig. 9. Right lateral view of the skeleton of the Owl Parrot (^S. /labroptilus). 

 Considerablv reduced. 



